63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
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"use strict";
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// Which Unicode version should be used?
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const version = "9.0.0";
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const start = require("unicode-" + version + "/Binary_Property/ID_Start/code-points.js")
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.filter(function(ch) { return ch > 0x7f; });
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let last = -1;
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const cont = [0x200c, 0x200d].concat(
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require("unicode-" + version + "/Binary_Property/ID_Continue/code-points.js")
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.filter(function(ch) {
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return ch > 0x7f && search(start, ch, last + 1) == -1;
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})
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);
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function search(arr, ch, starting) {
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for (let i = starting; arr[i] <= ch && i < arr.length; last = i++)
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if (arr[i] === ch)
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return i;
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return -1;
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}
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function pad(str, width) {
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while (str.length < width) str = "0" + str;
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return str;
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}
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function esc(code) {
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const hex = code.toString(16);
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if (hex.length <= 2) return "\\x" + pad(hex, 2);
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else return "\\u" + pad(hex, 4);
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}
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function generate(chars) {
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const astral = [];
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let re = "";
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for (let i = 0, at = 0x10000; i < chars.length; i++) {
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const from = chars[i];
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let to = from;
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while (i < chars.length - 1 && chars[i + 1] == to + 1) {
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i++;
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to++;
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}
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if (to <= 0xffff) {
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if (from == to) re += esc(from);
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else if (from + 1 == to) re += esc(from) + esc(to);
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else re += esc(from) + "-" + esc(to);
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} else {
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astral.push(from - at, to - from);
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at = to;
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}
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}
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return { nonASCII: re, astral: astral };
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}
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const startData = generate(start);
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const contData = generate(cont);
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console.log("let nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\";");
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console.log("let nonASCIIidentifierChars = \"" + contData.nonASCII + "\";");
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console.log("const astralIdentifierStartCodes = " + JSON.stringify(startData.astral) + ";");
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console.log("const astralIdentifierCodes = " + JSON.stringify(contData.astral) + ";");
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